21917945

素因数分解:

$5^1\times 7^2\times {\mathrm{137}}^1\times {\mathrm{653}}^1$

素因数の和:809

約数の個数: 24

約数和(自身を含む): 30866184

約数和(自身を除く): 8948239

約数列:

[1, 5, 7, 35, 49, 137, 245, 653, 685, 959, 3265, 4571, 4795, 6713, 22855, 31997, 33565, 89461, 159985, 447305, 626227, 3131135, 4383589, 21917945]

約数ペア:

[(1, 21917945), (5, 4383589), (7, 3131135), (35, 626227), (49, 447305), (137, 159985), (245, 89461), (653, 33565), (685, 31997), (959, 22855), (3265, 6713), (4571, 4795)]